Needleless injector



FIG. 1 is a right side elevation view of a needleless injector showing our new design;

FIG. 2 is left side elevation view thereof;

FIG. 3 is top plan view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is front elevation view thereof;

FIG. 6 is back elevation view thereof; and,

FIG. 7 is front, top and right side perspective view thereof. 

The ornamental design for a needleless injector, as shown and described. 